1. Department of Public HealthOsaka City University Graduate School of Medicine Osaka Japan
2. The 4th Department of Internal MedicineTokyo Medical University Tokyo Japan
3. Department of Disaster and Emergency MedicineKyushu University Graduate School of Medical Sciences Fukuoka Japan
4. Research Center for Innovative Cancer TherapyKurume University Kurume Japan
5. Department of Advanced Gastrointestinal EndoscopyFukushima Medical University Fukushima Japan
6. Department of Public HealthJichi Medical University Tochigi Japan